John C Klensin <john-i...@jck.com> wrote: > > MX target names should obey the LDH host name rules. > > I completely agree, but SMTP imposes no such requirement.
RFC 974 specifies that the target of an MX record is a host name. > > You won't be able to enter [*******] into many DNS admin tools since > > they enforce LDH syntax. Some nameservers (e.g. BIND) will by default > > refuse to load a zone with a non-hostname MX target. > > Does that imply that this spec should contain a warning that > loading one of these "null MX" records may require a > configuration change in one's nameserver? No, because "." doesn't violate LDH syntax. (What admin GUIs do is another matter...) Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Humber, Thames: Mainly southeast 4 or 5, increasing 6 at times. Slight or moderate. Thundery showers. Good, occasionally poor. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
